I'm glad that Klay is still doing reasonably well without Luka. He's not going to be the same but IMO getting him in the flow is critical for whatever this team hopes to be in the postseason.
It's all about health. Calves are tricky and you can't play around with the area because of the Achilles. Aaron Gordon is going through the same thing right now in Denver.
Hopefully the team won't fall too far right now and they can't rush Luka back even if they do.